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    <title>Document</title>
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<script>
    function computed(a){
       let arr= a.split("")
       arr=arr.reverse()
       arr=arr.join('')
       arr=arr.replace(/\s*/g,"")
       arr=arr.replace("!",'啊')
       arr=arr.replace("h",'H')
       arr=arr.replace("w",'W')

       console.log(arr);
        
    }
    computed("hello world 我爱你!")
</script>